The biggest meteorite found so far is 7 mm across less than 1/4 inch, it was a chondrite meteorite

Scientists made great progress understanding stony meteoroid impacts with the earth's atmosphere tat the time when comet shoemaker Levy hit Jupiter. Stony meteoroids that are the size of the one in Russia or the even larger Tunguska event very quickly encounter thickening air at high mach number. The physical stress of the atmospheric pressure due to high velocity of the meteoroid causes the meteoroid to fracture. The multiple smaller fragments decellerate more quickly than the entire original object object with accompanying surface heating and continued fracturing into smaller pieces. (These small fragments remain cool in the center while the surface is incandescent.) The breakup deposits a great deal of kinetic energy into a shock wave.

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